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%I #14 Jul 11 2021 01:14:15
%S 1153,1709,1777,2129,2458,2741,3226,3649,3701,3961,4729,4877,5818,
%T 5821,6161,6473,6746,7034,7274,7433,8117,8273,9277,9370,9626,10345,
%U 11125,11194,11197,11530,11633,11821,11861,12209,12437,12701,12938,13274,13289
%N Numbers k such that the continued fraction for sqrt(k) has period 43.
%t cf43Q[n_]:=Module[{s=Sqrt[n]},!IntegerQ[s]&&Length[ ContinuedFraction[s][[2]]]==43]; Select[Range[15000],cf43Q] (* _Harvey P. Dale_, Nov 26 2012 *)
%Y Cf. A003285.
%K nonn
%O 1,1
%A _David W. Wilson_
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